spline count

[292farmer]

i tried the search option in forum and i think i have it as that the dana 60 in my 1972 gmc c25 is a 30spline count, does this sound right? i did see one or two mentions of 16 and 23 spline count but i thought those were fords? reason im asking is im pricing out a new r&p and locker, and they need spline count. and if possible would like to know before i rip the rear end apart so i can do it all at once and not have to keep opening up and closing the rear end. thanks!!